POLYETHYLENE RESIN COMPOSITION FOR PIPE METHOD OF MANUFACTURING THE SAME AND MOLDED ARTICLE PRODUCED FROM THE SAME
The present invention relates to a polyethylene resin composition for pipes, a method for manufacturing the same, and a molded article including the same, wherein the polyethylene resin composition has a melt flow index (5 kg load, 190℃) which is from 0.16 g/10min to 0.24 g/10min and is prepared by...
Gespeichert in:
Hauptverfasser: | , , |
---|---|
Format: | Patent |
Sprache: | eng ; kor |
Schlagworte: | |
Online-Zugang: | Volltext bestellen |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | The present invention relates to a polyethylene resin composition for pipes, a method for manufacturing the same, and a molded article including the same, wherein the polyethylene resin composition has a melt flow index (5 kg load, 190℃) which is from 0.16 g/10min to 0.24 g/10min and is prepared by passing through a two-stage reactor, passing through an extruder, and adding peroxide. The change rate of the melt flow index (MI) (5 kg load, 190℃) by the extruder is 60 to 90 % according to equation 1 below, and the change rate in the melt flow index (MI) (5kg load, 190℃) due to the peroxide is 10 to 40 % according to equation 2 below. In equation 1, {(MI after passing through the two-stage reactor - MI after passing through the extruder) / (MI after passing through the two-stage reactor - final MI)} X 100. In equation 2, {(MI after passing through the extruder - MI after adding peroxide) / (MI after passing through the two-stage reactor - final MI)} X 100.
용융흐름지수(5kg 하중, 190℃)가 0.16 g/10분 내지 0.24 g/10분이고, 2단 반응기 통과, 압출기 통과 및 과산화물 첨가로 제조되는 폴리에틸렌 수지 조성물에서, 상기 압출기에 의한 용융흐름지수(MI)(5kg 하중, 190℃)의 변화율이 하기 수학식 1에 따라 60% 내지 90% 이며, 상기 과산화물에 의한 용융흐름지수(MI)(5kg 하중, 190℃)의 변화율이 하기 수학식 2에 따라 10% 내지 40%인 파이프용 폴리에틸렌 수지 조성물, 이의 제조 방법 및 이를 포함하는 성형품에 관한 것이다. [수학식 1] {(2단 반응기 통과 후 MI - 압출기 통과 후 MI) / (2단 반응기 통과 후 MI - 최종 MI)} X 100 [수학식 2] {(압출기 통과 후 MI - 과산화물 첨가 후 MI) / (2단 반응기 통과 후 MI - 최종 MI)} X 100 |
---|